sandboxjs vulnerabilities and fixes

Recent CVEs affecting sandboxjs, with upgrade or downgrade steps. 3 tracked.

sandboxjs has 3 tracked vulnerabilities, 1 critical. A fixed release or vendor patch exists for 3. Most recent: 2026-04-06. Highest priority: CVE-2026-34208 (score 60/100).

• CVE-2026-34208 CRITICAL 10.0 UPGRADE SandboxJS is a JavaScript sandboxing library
• CVE-2026-34211 HIGH 7.5 UPGRADE SandboxJS is a JavaScript sandboxing library
• CVE-2026-34217 HIGH 7.2 UPGRADE SandboxJS is a JavaScript sandboxing library

FAQ

How do I fix sandboxjs vulnerabilities?

Open the CVE for your version, check the affected range, then follow the listed action: upgrade to the fixed release, or downgrade or mitigate if no fix exists yet. Commands for each OS are shown on every CVE page.

Is sandboxjs being exploited right now?

None of the tracked sandboxjs CVEs are on the CISA Known Exploited Vulnerabilities list at the moment. This is checked every 20 minutes.

Which sandboxjs CVE should I patch first?

CVE-2026-34208 currently ranks highest (60/100): SandboxJS is a JavaScript sandboxing library.

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